/Engine/Plugins/Online/OnlineServicesOSSAdapter/Source/Public/Online/AuthOSSAdapter.h
IAuth.
virtual [TOnlineAsyncOpHandle](API\Plugins\OnlineServicesInterface\Online\TOnlineAsyncOpHandle)< [FAuthLogin](API\Plugins\OnlineServicesInterface\Online\FAuthLogin) > Login ( [FAuthLogin::Params](API\Plugins\OnlineServicesInterface\Online\FAuthLogin\Params) && Params )